Is it viable to use a slow OH now?

So!

I have abandoned my rogue since 4.3, not due to some fanboyish thing, I just wanted a change after many years, however, less then 3 weeks in, ive found myself yearning my rogue, my warrior is fully geared to tank LFR, and fully honor geared.. and its fun. i hit hard, but.. something is missing, my druid is 88, and getting on fine. and priest is hovering around 87

my question about rogue is simply, is it viable? there is a huge void of info about mop rogues, but our energy regen thing (as combat) states that the proc chance is proportionate to weapondamage? which would mean possibly that OH slow is viable? making for some sick killing spree's?

please dont use this thread to post 'dont bother playing rogue, play X', i do not care who is fotm, rogue is fun :P

slow OH is actually -better- than a fast OH in a perfect world for combat. This would be times that you can optimize the use of killing spree. That being said, if you cant then a fast OH would be better due to poison procs.

OFFHAND ONLY: 1.8s daggers, and 2.6s axe/fist/sword/mace are exceptionally close in performance. However, 2.6s weapons appear to have a fraction of a % of an advantage. Try to keep a 1.8s dagger around for when you can't use Killing Spree optimally.